HP Cisco MDS 8/24c Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Rel - Page 33

Limitations and Restrictions Send documentation comments to [email protected] Configuring Buffer Credits on a Generation 2 or Generation 3 Module When you configure port mode to auto or E on a Generation 2 module, one of the ports will not come up for the following configuration: • Port Mode: auto or E for all of the ports • Rate Mode: dedicated • Buffer Credits: default value When you configure port mode to auto or E on a Generation 3 module, one or two of the ports will not come up for the following configuration: • Port Mode: auto or E for the first half of the ports, the second half of the ports, or for all of the ports • Rate Mode: dedicated • Buffer Credits: default value When you configure port mode to auto or E for all ports in the global buffer pool, you need to reconfigure buffer credits on one or more of the ports. The total number of buffer credits configured for all the ports in the global buffer pool should be reduced by 64. Features Not Supported on the Cisco MDS 9148 Switch The Cisco MDS 9148 Multilayer Fabric Switch does not support the following NX-OS features: • IVR • Remote Span • Translative loop support • FCC - no generation, quench reaction only • FC-Redirect In addition, the following features have these limits: • VSANs - 31 maximum • SPAN - 1 session maximum PPRC Not Supported with FCIP Write Acceleration IBM Peer to Peer Remote Copy (PPRC) is not supported with FCIP Write Acceleration. OL-21012-02 Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.0(4) 33